{"id":"CVE-2026-31563","title":"net: macb: Use dev_consume_skb_any() to free TX SKBs","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: macb: Use dev_consume_skb_any() to free TX SKBs\n\nThe napi_consume_skb() function is not intended to be called in an IRQ\ndisabled context. However, after commit 6bc…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= aeeafeb29b1b270302a9a85a13f7d70a68a3b9e6 < 92e7081f0c79d9073087e54bab745bb184192c2e","Linux >= 5430388a81113e62a2d48b5d7dc1e76231908ebf < 78c8b090a3d5c1689dc989861b0163180db2b3f8","Linux >= 7db8aa3fc4ed0a2928246747b2514b0741a8187e < 984350b37372f79f71d4f0a5264c640e40daf9ce","Linux >= 6bc8a5098bf4a365c4086a4a4130bfab10a58260 < f4bc91398b579730284328322365afa77a9d568f","Linux >= 6bc8a5098bf4a365c4086a4a4130bfab10a58260 < ca4d05afb4683d685bb2c6fccae4386c478f524a","Linux >= 6bc8a5098bf4a365c4086a4a4130bfab10a58260 < 647b8a2fe474474704110db6bd07f7a139e621eb","Linux a4cb0a15ab8e6d06c08229a2c7bdbe1f2454473f","Linux >= 6.1.151 < 6.1.168","Linux >= 6.6.105 < 6.6.131","Linux >= 6.12.46 < 6.12.80","Linux >= 6.16.6 < 6.17","Linux 6.17"],"published":"2026-04-24","updated":"2026-09-08","sourceUpdated":"2026-09-08T08:47:45.128Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-31563","references":[{"url":"https://git.kernel.org/stable/c/92e7081f0c79d9073087e54bab745bb184192c2e"},{"url":"https://git.kernel.org/stable/c/78c8b090a3d5c1689dc989861b0163180db2b3f8"},{"url":"https://git.kernel.org/stable/c/984350b37372f79f71d4f0a5264c640e40daf9ce"},{"url":"https://git.kernel.org/stable/c/f4bc91398b579730284328322365afa77a9d568f"},{"url":"https://git.kernel.org/stable/c/ca4d05afb4683d685bb2c6fccae4386c478f524a"},{"url":"https://git.kernel.org/stable/c/647b8a2fe474474704110db6bd07f7a139e621eb"}],"tags":["cve.org"],"epss":0.00501,"epssPercentile":0.41953,"ingestedAt":"2026-09-08T15:33:26.990Z","slug":"CVE-2026-31563","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnet: macb: Use dev_consume_skb_any() to free TX SKBs\n\nThe napi_consume_skb() function is not intended to be called in an IRQ\ndisabled context. However, after commit 6bc8a5098bf4 (\"net: macb: Fix\ntx_ptr_lock locking\"), the freeing of TX SKBs is performed with IRQs\ndisabled. To resolve the following call trace, use dev_consume_skb_any()\nfor freeing TX SKBs:\n   WARNING: kernel/softirq.c:430 at __local_bh_enable_ip+0x174/0x188, CPU#0: ksoftirqd/0/15\n   Modules linked in:\n   CPU: 0 UID: 0 PID: 15 Comm: ksoftirqd/0 Not tainted 7.0.0-rc4-next-20260319-yocto-standard-dirty #37 PREEMPT\n   Hardware name: ZynqMP ZCU102 Rev1.1 (DT)\n   pstate: 200000c5 (nzCv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n   pc : __local_bh_enable_ip+0x174/0x188\n   lr : local_bh_enable+0x24/0x38\n   sp : ffff800082b3bb10\n   x29: ffff800082b3bb10 x28: ffff0008031f3c00 x27: 000000000011ede0\n   x26: ffff000800a7ff00 x25: ffff800083937ce8 x24: 0000000000017a80\n   x23: ffff000803243a78 x22: 0000000000000040 x21: 0000000000000000\n   x20: ffff000800394c80 x19: 0000000000000200 x18: 0000000000000001\n   x17: 0000000000000001 x16: ffff000803240000 x15: 0000000000000000\n   x14: ffffffffffffffff x13: 0000000000000028 x12: ffff000800395650\n   x11: ffff8000821d1528 x10: ffff800081c2bc08 x9 : ffff800081c1e258\n   x8 : 0000000100000301 x7 : ffff8000810426ec x6 : 0000000000000000\n   x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000000\n   x2 : 0000000000000008 x1 : 0000000000000200 x0 : ffff8000810428dc\n   Call trace:\n    __local_bh_enable_ip+0x174/0x188 (P)\n    local_bh_enable+0x24/0x38\n    skb_attempt_defer_free+0x190/0x1d8\n    napi_consume_skb+0x58/0x108\n    macb_tx_poll+0x1a4/0x558\n    __napi_poll+0x50/0x198\n    net_rx_action+0x1f4/0x3d8\n    handle_softirqs+0x16c/0x560\n    run_ksoftirqd+0x44/0x80\n    smpboot_thread_fn+0x1d8/0x338\n    kthread+0x120/0x150\n    ret_from_fork+0x10/0x20\n   irq event stamp: 29751\n   hardirqs last  enabled at (29750): [<ffff8000813be184>] _raw_spin_unlock_irqrestore+0x44/0x88\n   hardirqs last disabled at (29751): [<ffff8000813bdf60>] _raw_spin_lock_irqsave+0x38/0x98\n   softirqs last  enabled at (29150): [<ffff8000800f1aec>] handle_softirqs+0x504/0x560\n   softirqs last disabled at (29153): [<ffff8000800f2fec>] run_ksoftirqd+0x44/0x80\n\n## Affected\n\n- `Linux >= aeeafeb29b1b270302a9a85a13f7d70a68a3b9e6 < 92e7081f0c79d9073087e54bab745bb184192c2e`\n- `Linux >= 5430388a81113e62a2d48b5d7dc1e76231908ebf < 78c8b090a3d5c1689dc989861b0163180db2b3f8`\n- `Linux >= 7db8aa3fc4ed0a2928246747b2514b0741a8187e < 984350b37372f79f71d4f0a5264c640e40daf9ce`\n- `Linux >= 6bc8a5098bf4a365c4086a4a4130bfab10a58260 < f4bc91398b579730284328322365afa77a9d568f`\n- `Linux >= 6bc8a5098bf4a365c4086a4a4130bfab10a58260 < ca4d05afb4683d685bb2c6fccae4386c478f524a`\n- `Linux >= 6bc8a5098bf4a365c4086a4a4130bfab10a58260 < 647b8a2fe474474704110db6bd07f7a139e621eb`\n- `Linux a4cb0a15ab8e6d06c08229a2c7bdbe1f2454473f`\n- `Linux >= 6.1.151 < 6.1.168`\n- `Linux >= 6.6.105 < 6.6.131`\n- `Linux >= 6.12.46 < 6.12.80`\n- `Linux >= 6.16.6 < 6.17`\n- `Linux 6.17`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}